TM 9-4520-272-14&P
0016 00
Table 1. Troubleshooting Procedure for Large Capacity Field Heater (LCFH).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 3. Replace a defective throttle
26. Heater starts, shuts down,
Step 1. This error code indicates that
Step 1. Tighten connection between
and displays error code: H421
the system is not receiving a response
operator box control cable and
from the operator control box. Turn
operator control box. Tighten
power switch to OFF. Ensure that the
connection between operator box
connection between the operator
control cable and main control box
control box and the operator control box
control box.
cable is secure. Ensure that the
connector is not damaged in any way
and that the cable is not cut or
damaged.
Step 2. Ensure that the connection
Step 2. Replace a damaged or
between the main control box and the
defective operator control box
operator control box cable is secure.
control cable.
Ensure that the connector is not
damaged in any way and that the cable
is not cut or damaged.
Step 1. Lubricate engine throttle
27. Heater starts, shuts down,
Step 1. This error code indicates that
and displays error code: H511
the engine failed to start after 3 tries.
cable.
Turn power switch to OFF. Open engine
bay access door and inspect location of
engine throttle. Ensure that the engine
throttle cable is not stuck in OFF
position.
Step 2. Replace a broken or
Step 2. Check and ensure that fuel
defective engine throttle cable.
pump is operating properly.
Step 3. Replace a broken or
Step 3. Check fuel filter and determine if
defective engine throttle stop
replacement is required.
Step 4. Replace a defective fuel
Step 4. Check diesel engine starter and
pump.
ensure that it is turning with sufficient
RPM to start engine.
Step 5. Replace fuel filter if required.
Step 6. Replace a starter that is not
turning with sufficient RPM to start
engine.
28. Heater starts, shuts down,
Step 1. This error code indicates that
Step 1. Secure a loose alternator
and displays error code: H111
there is an open circuit on the alternator
excitation wire. Repair a broken or
excitation line. Turn power switch to
damaged wire.
OFF. Check the alternator excitation
wire (see WP 0039 00 for location) and
ensure that it is connected securely and
not broken or damaged in any way.
Step 2. Check alternator output and
Step 2. Replace a defective
determine if alternator is operating
alternator IAW WP 0039 00.
0016 00-9
